Oil burner



March 27, 1928.

R. R. EZDORF OIL BURNER Filed Aug. 19.1926 4'sheets-sheet 2 March 27,QZS.

R. R. EZDORF OIL BURNER 19, 1926 4 Sheets-Sheet 3 Filed Aug March 27,1928.

R. R. EZDORF O IL BURNER Filed Aug. 19. 192e 4 sheets-Sheet 4 'III/IIIIII/l Patenfed Mar. 2v, 192s.

UNITED STATES PATENT ori-ica RICHARD R. EZDORF, -OF BALTIMORE, MARYLAND,ASSIGNOR TO FUELO CORPORATION, OF WASHINGTON, DISTRICT OF COLUMBIA, ACORPORATION OF DELAWARE.

OIL BURNER.

.Application led August 19, 1926. Serial No. 130,310.

This invention relates to oil burners. The'primary object of theinvention isto rovide anoil burner wi'th instrumentalities or delayingthe admission of oil to the discharging device until after apredetermined.

condition exists within the fan housing.

A further obj ect of the invention is to provide means for regulatingthe supply of oil to the discharging and atomizing device until afterthe motor has started and until a predetermined pressure conditionexists within the fan housing.

A further object of the invention is to provide an automatic means fordecreasing or shutting olf entirely the oil feed when the ressure withinthe fan housing recedes beow its normal operating condition. MoreSpecifically, the invention compreliendsv the employment of a diaphragmwithin a chamber, which chamber is in communication with the fan housingand to connect the diahragm with a valve actuating device wherey thevalve will be actuated to admit oil to the nozzle only after apredetermined pressure' condition is maintained within the saiddiaphragm chamber.

Still another object of the invention is to provide an' adjustable meansbetween the diaphragm and the valve actuating device whereby theadmission of oil to the atomizing device can be regulated in accordancewith the needs of the occasion. Still another object of the invention isto provide an oil feeding device snugly located within the confines ofthe rotating cup atomizer for the purpose of feeding the oil as a filmto the periphery of the rotating cup, at which point the oil issubjected to an air blast for complete atomization.

Other objects of the invention will be apparent to those skilled in theartv upon a reading of the following specification in conjunction withthe drawings attached hereto and forming a part hereof, in which Fig. 1is a top view showing the complete assembled machine,

Fig. 2 is a longitudinal section taken on lines 2-2 of Fig. 1,

Fig. 3 is a detailed view take-n on lines 50 3-3 of Fig. 3,

Fig. 4 is a detailed view showing the different angular positions of thealternate long` and short vanes,4

- Fig. 5 is a view partly in section showing the arrangement of the oilfeeding pipes and the pivotally arranged air shutters for regulating thesupplyof air to the fan housing,

Fig 6 is a detailed longitudinal sectional vlew of the stationary oilreceiving device ang the rotatableup and oil feeding device, an

Figs. 7 and 8 are detailed views of the oil feeding device and the oilreceiving device, respectively.

eferring now to the drawings, reference numeral 1 designates' anenclosure for the motor 2. At. the rear of the housing, there isprefcrablyprovided a screen 3 for the admission of air for cooling themotor and preheating the air preliminarily to the introduction of theair to the outlet of the apparatus where it contacts with and atomizesthe discharging oil. 4 designates a motor base provided with a diaphragmchamber 5; suitable fasteningbolts 6 are provided for securing the motorto the base. Within the confines of the diaphragm chamber 5 there ispositioned a diaphragm 7 A downwardly extendingv rod is secured at itsupper end to the diaphragm and extends through the opening 9 providedwithin the wall 10 of the chamber 5. This rod is provided with a seriesof openings 11 at its lower end in which openings one end of the lever12-may be adjustably secured for the purpose hereinafter described. Therod 12 is pivotally mounted as at 13,/ and is provided with an engaging'ortionJ 14 for lifting the deviceV 15 upwar ly to thereby open the valve16 when the pressure within the chamber 5 is suiiicient to distend thediaphragm and rock the lever 12 downwardly. The fan housing 17 issecured to the base'4 by means of de vices 18. This fan housing hassecured thereto a vstationary iiange 18 and an outlet nozzle 19. A`circumferential opening 20 is provided for the fan housing to receiveair which has been preheated by passing over the motor 2. The housing 1is preferably supported by a laterally extending circumferentiallydisposed flange 21, there preferably being a packing 22 interposedbetween the periphery of the housing 1 andthe aforesaid fiange 21. 23 isa rotatable hub secured to the motor shaft 24 by means of a screw 25.This screw 25 furthermore secures the atomizing cupA `26 fast to thevshaft24 to thereby rotate the cup when lthe motor is in operation.Within the confines of the atomizing cup 26 there is provided an oilfeeding device 27 provided with spirally arranged grooves 28 for thepurpose of positively feeding the oil outwardly as a film to theperiphery of the atomizing cup. The vhub 23 has secured thereto the fan27', the said fan comprising walls 28 and 29. Interposed between thewalls of the fan are vanes 30 and 31. These vanes are positioned atvarying angles and are of alternative lengths, as shown in Fig. 4. t

Stationarily disposed upon the motor extension 29 and non-rotatablyassociated with the motor shaft 24 there is provided an oil receivingdevice 30 secured to the aforesaid flange 29 by means of a screw 31.This oil receiving device is provided with an aperture 32 for receivingthe oil conduit 33. The aperture 32 has communicating therewith anobliquely disposed port 34. Upon the interior of the oil receivingdevice 3() there is provided a tubular element 35 fitting over the motorshaft 24 and provided with a circumferential recess 36 in connectionvwith the aforesaid port 34. rlhis circumferential recess hascommunicating therewith, preferably at the top, a multiplicity ofrestricted longitudinal ports 37 for discharging the oil from thecircumferential recess 36 with considerable velocity into the innerportion of the rotatable cup 26 from whence the oil is positively fedoutwardly by the rotating device 27 having the spiral grooves therein ashereinbefore described.

The oil for the burner is supplied in any well-known and desirablemanner, but ll preferably employ an overhead auxiliary re ceptaclehaving associated therewith an automatic pump for maintaining therequisite supply of oil for the demands of the burner. Under headpressure, the oil is supplied by means of a pipe 38 through the valvecasing 39 within'which is secured. the aforesaid valve 16, and fromthence the oil is fed through a pipe 40 upwardly through thecommunicating conduit 41 and thence laterally as at 42 where it isconnected to the aperture 32 as above described. A manually operablevalve 43 is provided for completly shutting o@ the oil supply whendes1re c The means of communication between the fan chamber and thediaphragm chamber accenna the diaphragm 7, which diaphragm,through theassociated devices, 8, 12, 14, and 15 open the valve 16, thus permittingoil to be supplied through the oblique passage 34 and the ports 37 intothe cup 26, from which itis postively fed outwardly by means ofthe oilfeeding device 29. It will thus be seen that the oil is not admitteduntil after a time interval has expired and until after a predeterminedpressure condition exists within the fan chamber, this obviatlng thedangers incident to accumulating oil during the starting operation andthe smoking and car bonization incident thereto. Moreover, when thepressure within the fan chamber recedes below that of normal operatingconditions, the oil supply is immediately and automatically shut olf toprevent a further admission of oil to the chamber. The oil isfurthermore automatically and proportionately controlled by virtue ofthe aforesaid diaphragm. rlhe term diaphragm as used in my claims isintended to embrace pumping devices such Having thus described theinvention. 'what il claim is:

1. ln an'oil burner, in combination, a fan housing, having a rotatablefan therein, an oil discharging cup within the fan housing, said cup andfan being operatively connected with the shaft of an electric motor, a

stationary oil receiving device mounted on the motor shaft, a portconnected with the oil receiving device, a non-rotatable tubular elementfitting over the shaft of the electric motor and having a portion snuglytting between the motor shaft and the stationary oil receiving deviceand secured to said stationary oil receiving device, said tubularelement having a circumferential recess in communication with the saidports, a pluralit of longitudinal ports communicating wit thecircumferential port for discharging oil into said cup.

2. lin an oil burner, in combination, a fan housing, having a rotatablefan therein, an

oil discharging cup within the fan housing,

said cup and fan being operatively connected with the shaft ofanelectric motor, a sta tionary oil receiving device, a port connectedwith the'oil receiving device, a tubular element fitting over the shaftof the electric motor and secured to said stationary oil receivingdevice, said tubular element having a circumferential recess incommunication with the said ports, a plurality of longitudilill@ferential port for discharging1 Lacasse nal ports communicating with thecircumoil into the cup, an oil feeding device aving spiral grooveslocated within thecup for feeding the oil discharged within the cup as afilm to the outlet of said cup.

3. In an oil burner, the combination with a base for supporting a motor,said base being provided with an integral diaphragm chamber in the lowerportion thereof, a diaphragm in said chamber, an extension for saiddiaphragm, said extension protruding through an opening in the lowerwall of said chamber, a fan housing, a rotatable oil atomizing cupWithin said fan housing, said cup and fan being secured tothe shaft ofsaid motor, a communication from said diaphragm chamber to said fanhousing, an oil admission conduit in close proximity to said chamber, avalve for said conduit, a lever adjustably secured to said extension forthe diaphragm, and 'pivotally secured with respect to said oil conduit,said lever being provided with an engaging finger at its extremity forenga ing said valve to open the same vto admit oi to the said atomizmgcup when the pressure transmitted from said :fan

housing to said diaphragm chamber reaches a predetermined value.

4. In an oil burner, the combination with a base` forv supporting amotor, said base being provided with a diaphragm chamber in the lowerportion thereof, a diaphragm in said chamber, an extension for saiddiaphragm, said extension protruding through an opening in the lowerwall of said chamber, a fan housing, a rotatable oil atomizin cupwithinvsaid fan housing, said cup an fan being secured to the shaft ofsaid motor, a communication from said diaphragm to the fan housing, anoil admission conduit in close proximity to said chamber, a valve forsaid conduit, a lever adjustably secured t0 said extension for saiddiaphragm, and pivotally secured with respect to said oil conduit, saidlever being provided with a portion for engaging said valve to open thesame and admit oil to said atomizlng cup when the pressure transmittedfrom the fan housing to the diaphragm chamber reaches a predeterminedvalue.-

In testimony whereof l ax my siature.

